Thus, the total Faddeev-Popov action  \(S_t = S + S_{gf}+ S_{gh}\) 
 depends on the
choice of the gauge fixing condition \(\chi ^\alpha \)  and the weight
operator (sometimes called weight function) \(Y_{\alpha \beta }\) . In what
follows, we consider a few important examples of the choice of these
two objects in different models of QG. As
with the most of this review, the reader can find more detailed
discussion in [1]}.
